Benzene is a little hard for regular consumers to come by these days, but Toluene is it's closest relative chemically speaking. Naptha and Naphthalene are not the same. It is one of those common naming versus chemical naming things that causes general confusion. Naptha is white gas, Zippo lighter fluid, a different fraction of the oil refining process. Naphthalene is two benzene rings sharing one side of the ring, and it is what used to be in moth balls to drive the lil' buggers away. OK, enough chem nrrding out for the afternoon.
But, for all practical purposes, you can substitute Toluene for Benzene.
Patrick